Improvement in machines for bending chain-unics



J. BAIRDL MACHINES FOR BEN DING CHAIN-LINKS. No. 169,333, Patented Nov. -2, 1875.

NPETERS, PNOTO-LITHDGRAPHER, WASHINGTONv D C,

JAMES BAIRD, 0F ALLEGHENY, PENNSYLVANIA.

' llVlPROVElVIENTIN MACHINES FOR'BE'ND'FNG cHArN-L'INK'S.

Specification forming part of Letters Patent No. 169.333, dated November 2, 1875; application filed 4 September 30, 1875.

clare the following to be a full, clear, concise,

and exact description thereof, reference being.

had to the accompanying drawings making a part of this specification, in which like letters indicate like parts.

Figure 1 represents a side view of my im proved machine. Fig. 2 represents a top or plan view of the same. Fig. 3 shows an end View of the left-hand end, Figs. 1,. 2. Fig. 4 shows a vertical section through the line w w, as seen from the opposite side of Fig. 2. Fig. 5 is a detached view of the shear or cutting device, with attachment for keeping the rod or wire in position; and Fig. 6 represents a ring as cut and bent by my improved machine.

My improved machine is designed for cutting and bending ring and link blanks, by feeding in the rod or wire to be bent, cutting the same into proper length for the size of blank required, and also in such manner that the ends of the blank, when bent, shall be prepared ready for welding without further manipulation, and bending and discharging the same, all these operations being performed automatically by the machine alone.

A A, Figs. 1, 2, and 3, represent the main frame of my machine, which may be supported in any suitable way. Secured to and extending up from the main frame are the plumber-blocks A A Fig. 2, which carry the driving-shaft A Parallel to the drivingshaft A and secured to cross-pieces of the main frame A A by means of plumber-blocks or bearings B B, Fig. 2, is a hollow shaft, 1) b, which is geared to the driving-shaft A by means of the gear-wheels 11 b which are adju'stably secured to their respective shafts by means of the set-screws c a passing through sleeves which project laterally from the wheels. The pinion f is also adjustably secured to the hollow shaft b b by means of set-screws and like sleeves c, and, gearing with the wheel f,

.drives the shaft g. This wheel f is, also ad Y justably secured to its shaft 9 bythe bindingscrew 0 The shaft g is supported upon and above the main frame by the brackets g 9 W 'and W are also wheels carried upon the shaft 9, the purpose of which-will be presently described. The hollow shaft b'b has at its end b an enlarged hollow cylindrical head Figs. 2 and 4, inside the cavity of which is a head-block, i, which is bound to the cylindrical head b by means of a bindingscrew, 0. Through the center of this head-block, and extending through the entire length of the hollow shaft 1) b, is a bending-mandrel e 0 That part of the mandrel e e which is within the head-block c is keyed to said head-block, so that the mandrel is free to move endwis'e within the head-block c and hollow shaftli b, and the mandrel 6 e head-block l, and cylindrical head b of the hollowshaft 12 b being thus connected, will rotate together. A spirally-ended sleeve, a, Fig. 2, projects from the head-blocke' out upon the end c of the mandrel e 0 making, by its abrupt ending, a

stop, a, Fig. 3, for the rod or wire a as it is fed forward to the mandrel, and also, as the ring or link is bending on the mandrel, the spiral sleeve to guides the wire laterally to one side, so that the ends of the blank, when bent, shall lap and be side by side, as shown in Fig. 6. The angular plate N N is adjustably secured to the main frame A A, and supports the feeding and cutting devices, as presently described. To the vertical part N is fitted thep'late D, in a dovetail or other suitable groove, which plate isadjusted in any desired position by the binding-screws 0 To the upper end of the plate D, at D, Fig. 2, is attached one end of the irregularly shaped frame K, which carries the feeding-rolls 1' w, the other end of the frame K being supported by the post L, whichrests upon the horizontal part N of the plate N-N. H

A bar, 6 Figs. 3, 4, sliding horizontally in a mortise in the upper part of the plate 1), is pressed by the spring e against the wire a, Fig. 3, and holds the wire against the face of the head-block a}, so that the end of the wire shall strike against the stop a, as 'it is fed forward by the rolls 1' r, andso that, as the wire iscarried to one side away from the head-block .i by the spiral sleeve (1, as already described,

and after the wire a is out between the mandrel e and bar 6 the bar 0 will force the uncut part or end of the wire back against the face of the head-block 43, as before. On the plate D, Fig. 4, is also arranged the shear h h, Figs. 2, 4, and 5, for cutting the rod or wire. The horizontal section or blade h Figs. 4, 5, is, by its stem h fixed in a dovetail slot and bound by set-screws 0 Through the cutting face of this blade k is a slot, 71?, Fig. 5, through which the wire n passes as it is fed to the mandrel c, Fig. 3. The stem h of the vertical blade h of the shear works in a groove, (3, in the plate D, and is held to its place bythe plate E, which is fastened upon the plate D. The cuttingfacesof the blades h h are so beveled and arranged as to give the desired bevel to the ends e i of the blanks when. cut. The vertical blade h isworked in its groove 0 from below by means of eleverGG, Fig. 4,which has its fulcrum at open the plate D, and is pivoted tothe bladeq h ath in any suitable manner. The lever G G passes back under the main frame AA,and the endG rests upon or is suitably connected with one arm, H, of the bell-crank lever H H, Figs. 1, 3. The bell-crank lever '11 His pivoted to the main frame by means of the bifurcated arm F, Figs. 1, 3. The arm Hof the bell-crank extends up by the side of the large gear-wheel f, to which is fixed an adjustable tappet, 0, which, asthe wheel revolves, is made to strike against the arm H of the bell-crank, and thus, by its adjustment, give anydesired amount of motion, through "the. bell-crank H H and lever G G, to. the

{shear h; and the wheel f being adjustable on the shaft 9, it may be so set relatively to the feeding device as to cause the shearto cut the wireat any point of its forward feed desired, jthus determining the length of the wirewhich forms the blank. This result is secured partly by the adjustment of the wheel f in a rotary "direction on its shaft,- by which I determine the point of the feed at which the cut shallbe made, and partly by the adjustment of the tappet g to or from the axial line of motion, by

which'latter means I determine the length of i 1 feed, at the termination of which the shearing action commences; When the tappet g is set "nearer to the shaftgjit engages the inclined faceofthe projection y so much the'sooner,

fend remains in engagement therewith so much tlielon'geqwiththe resnlt of a'greater lengthl nd reversely with an ad}.

j of; feeding v motion, jjnstment outward.

Thero'dor wire a is-fed to the mandrel eby uneansof the rolls rr, and,to give' an inter-c,

fmittent motionfto therolls w, so asto feed "inthe wire at the time desired, I gear to the Mon 4* the wheels 85 Figs. 2,, 3; a To the shaft; of meanest is fixed a ratchet-wheel, 28, Figs. iiijaandi pawl, u, held to theratchet wheel "j tbylthe spring v, and attached toa leveiyjw, which works inthe ratch et teeth. 'As the'wheel Woiitlie shaft g revolves, a tappet, g, adj ustably fixed tothe wheel Wflstrikes a projection or pin, y, ou the lever w, and raises thelever, and the pawl men gaging a tooth of the ratchetwheel it, causes it to rotate, and with it the gear-wheels s s and rolls 1 0'. As the tappet 9 leaves the projection or pin y the spring 2 draws the lever to down, and the attached pawl u slides back over the ratchet-wheel t,

. and rests until, by another revolution of the ble by means of the dovetail groove and slide at@and the slotted fastening at L, they may through these adjustments, be readily adapted to mandrels of difl'erent size. l The rod or wire n, on being fed forwardby the feeding-rolls r r, as described, and against the stop a on the under side of the mandrel e, as shown in Fig. 3, passes between the griping-dogp and mandrel e. The griping-dog p is'pivoted so as to swing with afree motion in a recess in the head-block i, as shown in Fig. 3, and is placed in such relation to the mandrel e that it will, by its eccentric-shape d end or head, gripe or bind a rod fed between it-and the mandrel tight against themandrel,

if force be applied to draw the rod out, and

the rod or wire, being thus bound, will be drawn along with the mandrel and head-block as they rotate.

Thewplate E, Figs. 3 and 4, may be extend-ed up against the wire at, as shown in Fig.3, to form a bridge or'stay for holding or guiding the 'wire against the mandrel as the;blank is being bent; but in bending elliptical linksyI 3 prefer to make use of the following device In the plate 0 0, Figs. 2 and 3, which is adjustably secured to the main frame AA, is placed a slide, PP, in adovetail or other suitable groove, which slide extends up towithin the, desired distance of the mandrel 6,; to keepthe wire to its place. I This slide is raised or. lowered, to follow the elliptically-shapedmandrel I I then employ'ed,-b'y 'theleverR R, Figsgl and 3, the attachment of the slide 1? P to the lever'RR being such as will allow the? slide to be set for different-sizedmandrelst cam'or segment of a wheel (shown by dotted :,lines it m 00 Fig. 3) is carried by the hollow -shaitlb b and incl'os'ed bythe yoke 31 y". f Thislyoke extends down on thennder side of thefra'me,

andmakes connection with thellever ,R B" at CB, Fig.1; As the cam 'wlw rotates, theyoke y will take a vertical motion, 'andhaco'rrespending vertical motioni be given, through the lever RR, 'tothe slide P P,'which*,-by

suitable adjustment of the several'parts,* may be'rnade to follow the shape ofanlelliptical,

In order to discharge the ring or link blank when bent, I fit at the end 6 of the mandrel e e a lever, T T Fig. 2, the lever encircling, by a yoke or collar, to, a sleeve, U, which sleeve is bound to the mandrel by the set-screw 0.

The end T of the lever T T extends into and follows the eccentric groove W in the camwheel W which wheel is adjustably fixed to the shaft 9 by the set-screw 0 By properly adjusting this wheel W the lever T T will, at the desired time, be moved by the deflection shown in the groove W, and the mandrel e 0 will be drawn by the lever endwise within the head-block i at 0, Fig. 2, and the bent blank formed upon the mandrel will be discharged, after which the mandrel will be returned to its former position by the redeflection of the eccentric groove W.

By releasing the binding-screw c the sleeve U may be removed from the end 0 of the mandrel, and by also releasing the binding-screw c in the cylindrical head I), Fig. 4:, which binds the head-block i, the head-blockt' and inclosed mandrel e 0 may be removed from the hollow shaft 12 b, and another head-block, with a mandrel of any desired form or size at its working end 0, may be inserted, and secured as before. I

The gear-wheels f f are so related as to give the shaft 1) 11 two revolutions to one revolution of the shaft g, and'the cutting and feeding devices will receive but one impulse or movement for each two revolutions of the mandrel e 6 inclosed in the shaft 11 12 Thus a little more than one revolution of the mandrel e 0 may be employed in bending a blank, thereby lapping the ends sufficiently for weldin g, as shown in Fig. 6, and during the remainder of the second revolution the blank formed on the mandrel will be discharged, and the mandrel replaced in position for forming another blank.

The parts of my machine being each and severally adjustable, the separate devices of which it is composed-namely, the feeding, cutting, bending, and discharging devices, and the device for causing the bridge or brake P P to follow the shape of the bending-mam drel-all may be made to operate in such relation to each other as to perform the functions for which they were intended at the desired time and in the desired manner automatically, and without the intervention of manual labor or skill. Thus the feeding-rolls r r, Fig. 3, taking the wire a from a continuous coil, feed it, in the manner described, through the slot in the shear-blade h Fig. 4, direct to the under side .of the mandrel c, Fig. 3, against the stop a, andbetween. the griping-dog p and mandrel 0, when the dog 19 will gripe or bind the wire tight against the mandrel e, and, as it rotates, the wire will be drawn along with it. By the proper adjustment of the wheel f and tappet 0, Fig.2, which operate the-cutting device, as described, the shear-blade h, Fig. 4, will be carried across the face of the blade b cutting the wire at such'time that the piece bound to the mandrel c, Fig. 3, will be of proper length for the blank designed, and also cutting the wire in such manner that the ends of the blank shall be prepared for welding, as in Fig. 6. The slide P P, Fig. 3, being made to follow the shape of the mandrel. in the manner described, and keeping at a fixed distance from it, the wire forming the blank will be held by it tight against the mandrel until it is bent to the form of the mau drel. By properly adjusting the wheel W Fig. 2, the mandrel c 6 will be drawn within the head-block i by the lever T T, and the blank formed on the mandrel will be discharged,'when the mandrel will be returned to its former position, and the several devices of the machine will be ready to co-operate in forming another blank, in the manner described.

Instead of the wheel W and tappet g for raising intermittingly the lever to, there may be substituted two or more eccentric elliptical gear-wheels, placed in such relation as to give a rapid rate of rotation to the one bearing a tappet at such time as the tappet may be in position to engage the projection 51 and raise the lever it, thus giving a very quick forward feed to the wire a at the time desired.

I claim as my invention 1. In a link cutting and bending machine, the combination of a bending-mandrel, e 0 adjustable bridge P P, griping-dog p, head-block t, with spiral sleeve a, shear h h and feedingrolls a" r, operated substantially in the manner and for the purposes set forth.

- 2. In combination with the bending-mandrel of a link cutting and bending machine, the griping-dog p, guide-bar c feeding-rolls r r, and spiral sleeve a, operated and arranged substantially as set forth.

3. In combination with the bending-mandrel of a link cutting and bending machine, the automatically-adjustable bridge P P, lever B R, yoke y, and cam or segment 00 09, arranged and operated substantially as set forth, whereby the bridge P P, by an upward and downward motion, follows the elliptical form of the bending-mandrel.

4:. In a link cutting and bending machine,

the horizontally-adjustable angular plate N N I and vertically-adjustable plate D, carrying thereon the cutting and feeding devices, and in combination therewith, whereby the cutting and feeding devices are adjustable to mandrels of different sizes, substantially as set forth.

5. In combination with the shears k W, the

and-mtchafi summa ion w the, derol e orimparbingw to t he rodfiffi i vapiablein length aw a ur ubst ntially se fo th! linku utting and end g aeh ne, th ek comhinatian of albending mandrel, e 6 with the. spiral sleeve a, stQp a5, and gpiping, dog 2,, sqbisrantially aa set. or

nlav mr oll w all and arranged subsb? din 2: machine;

man l n 

